diff --git a/frontend/generate-icons.mjs b/frontend/generate-icons.mjs deleted file mode 100644 index 1f178f9..0000000 --- a/frontend/generate-icons.mjs +++ /dev/null @@ -1,101 +0,0 @@ -import { writeFileSync, mkdirSync } from 'fs'; - -mkdirSync('./public', { recursive: true }); - -function crc32(buf) { - const table = new Uint32Array(256); - for (let n = 0; n < 256; n++) { - let c = n; - for (let k = 0; k < 8; k++) c = (c & 1) ? (0xedb88320 ^ (c >>> 1)) : (c >>> 1); - table[n] = c; - } - let crc = 0xffffffff; - for (const b of buf) crc = (table[(crc ^ b) & 0xff] ^ (crc >>> 8)); - return ((crc ^ 0xffffffff) >>> 0); -} - -function chunk(type, data) { - const t = Buffer.from(type, 'ascii'); - const len = Buffer.allocUnsafe(4); - len.writeUInt32BE(data.length, 0); - const crcInput = Buffer.concat([t, data]); - const crcBuf = Buffer.allocUnsafe(4); - crcBuf.writeUInt32BE(crc32(crcInput), 0); - return Buffer.concat([len, t, data, crcBuf]); -} - -function deflateStore(raw) { - // zlib header (deflate, no compression) - const header = Buffer.from([0x78, 0x01]); - const blocks = []; - const SIZE = 32768; - for (let i = 0; i < raw.length; i += SIZE) { - const slice = raw.slice(i, i + SIZE); - const last = (i + SIZE >= raw.length) ? 1 : 0; - const h = Buffer.allocUnsafe(5); - h[0] = last; - h.writeUInt16LE(slice.length, 1); - h.writeUInt16LE((~slice.length) & 0xffff, 3); - blocks.push(h, slice); - } - // Adler-32 - let s1 = 1, s2 = 0; - for (const b of raw) { - s1 = (s1 + b) % 65521; - s2 = (s2 + s1) % 65521; - } - const adler = Buffer.allocUnsafe(4); - adler.writeUInt32BE(((s2 << 16) | s1) >>> 0, 0); - return Buffer.concat([header, ...blocks, adler]); -} - -function makePNG(size) { - const cx = size / 2, cy = size / 2; - const outerR = size * 0.42, innerR = size * 0.30; - - // IHDR - const ihdr = Buffer.allocUnsafe(13); - ihdr.writeUInt32BE(size, 0); - ihdr.writeUInt32BE(size, 4); - ihdr[8] = 8; // bit depth - ihdr[9] = 2; // RGB - ihdr[10] = ihdr[11] = ihdr[12] = 0; - - // Raw pixel data (filter byte 0 per row) - const rows = []; - for (let y = 0; y < size; y++) { - const row = Buffer.allocUnsafe(1 + size * 3); - row[0] = 0; // filter none - for (let x = 0; x < size; x++) { - const dx = x - cx, dy = y - cy; - const d = Math.sqrt(dx * dx + dy * dy); - let r, g, b; - if (d < innerR) { - r = 0x4e; g = 0xcd; b = 0xc4; // teal - } else if (d < outerR) { - r = 0x1e; g = 0x6a; b = 0x65; // dark teal ring - } else { - r = 0x0d; g = 0x0d; b = 0x0f; // background - } - row[1 + x * 3] = r; - row[2 + x * 3] = g; - row[3 + x * 3] = b; - } - rows.push(row); - } - - const raw = Buffer.concat(rows); - const idat = deflateStore(raw); - - const sig = Buffer.from([137, 80, 78, 71, 13, 10, 26, 10]); - return Buffer.concat([ - sig, - chunk('IHDR', ihdr), - chunk('IDAT', idat), - chunk('IEND', Buffer.alloc(0)), - ]); -} - -writeFileSync('./public/icon-192.png', makePNG(192)); -writeFileSync('./public/icon-512.png', makePNG(512)); -console.log('✅ Icons generiert: icon-192.png + icon-512.png');